Saky Steel waxay soo saartaa 440 taxane ah oo adag oo martensitic ah oo bir aan miridh lahayn ah iyo saxanno 440A, 440B, 440C
AISI 440A, UNS S44002, JIS SUS440A, W.-nr. 1.4109 (DIN X70CrMo15) xaashiyo bir ah oo aan daxal lahayn, saxanno, iyo fidsan
AISI 440B, UNS S44003, JIS SUS440B, W.-nr. 1.4112 (DIN X90CrMoV18) xaashiyo bir ah oo aan daxal lahayn, saxanno, iyo fidsan
AISI 440C, UNS S44004, JIS SUS440C, W.-nr. 1.4125 (DIN X105CrMo17) xaashiyo bir ah oo aan daxal lahayn, saxanno, iyo fidsan
Qaybta kiimikada 440A 440B 440C:
| Fasal | C | Si | Mn | S | P | Cr | Ni | Mo |
| 440A | 0.60~0.75 | ≤1 | ≤1 | ≤0.030 | ≤0.040 | 16.00~18.00 | - | ≤0.75 |
| 440B | 0.85~0.95 | ≤1 | ≤1 | ≤0.030 | ≤0.035 | 16.00~18.00 | ≤0.60 | ≤0.75 |
| 440C | 0.95 – 1.20 | ≤1 | ≤1 | ≤0.030 | ≤0.040 | 16.00~18.00 | - | ≤0.75 |
Kaarboonka iyo adkaanta 440A-440B-440C ayaa si isdaba joog ah uga kordhay ABC (A-0.75%, B-0.9%, C-1.2%). 440C waa bir aan daxal lahayn oo aad u fiican oo heer sare ah oo leh adkaansho dhan 56-58 RC. Saddexdan birood waxay leeyihiin iska caabin miridhku wanaagsan yahay, 440A waa kan ugu fiican, 440C-na waa kan ugu hooseeya. 440C aad ayuu u badan yahay. Halabuurka kiimikada ee birta aan daxal lahayn ee martensitic waxaa lagu gartaa ku darista walxaha sida molybdenum, tungsten, vanadium, iyo niobium oo ku salaysan isku-darka qaybaha kala duwan ee 0.1%-1.0% C iyo 12%-27% Cr. Maadaama qaab-dhismeedka unugyadu uu yahay qaab-dhismeed kuyuub ah oo jirka ku yaal, xooggu si xoog leh ayuu hoos ugu dhacaa heerkulka sare. Ka hooseeya 600 ° C, xoogga heerkulka sare waa kan ugu sarreeya dhammaan noocyada birta aan daxal lahayn, xoogga gurguurtana sidoo kale waa kan ugu sarreeya. 440A waxay leedahay sifooyin aad u fiican oo lagu damiyo laguna adkeeyo iyo adkaysi sare. Waxay leedahay adkaysi ka sarreeya birta 440B iyo birta 440C. 440B waxaa loo isticmaalaa jarista qalabka, qalabka cabbiraadda, qalabka iyo waalka. Waxay leedahay adkaysi ka sarreeya birta 440A waxayna leedahay adkaysi ka sarreeya birta 440C. 440C waxay leedahay adkaysi ugu sarreeya dhammaan birta aan miridhku lahayn iyo birta u adkaysata kulaylka waxaana loo isticmaalaa tuubooyinka iyo qalabka. 440F waa heer bir ah oo hagaajiya sifooyinka fudud ee birta 440C ee loogu talagalay qalabka lagu shido ee otomaatiga ah.
Waqtiga boostada: Agoosto-17-2018